Julius beegmanf



(No Model.

J. BERGMANN.

STEAM BOILER.

No. 278,338. Patented Mar.6, 1883.

U ITED STATES PATENT OFFICE.

JULIUS BERGMANN, OF HAT'IINGEN, GERMANY.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 273,338, dated March 6,1883.

Application filed September 15, 1882.

To all whom it may concern.-

Be it known that I, JULIUs BERGMANN, a citizen of Germany, residing atHattingen, in the Empire of Germany, have invented new and usefulImprovements in Steam-Boilers, of which the following is aspecification.

The nature of my invention consists in the construction of a fluecylindrical boiler having all connection pipes or branches between theflues so arranged as to be away from the effect of the direct action ofthe fire, and thereby prevent the formation of incrustation in the same,while a perfectcir'culation of the water is insured.

In the accompanying drawings, Figure I represents a side view of myimproved boiler. Fig. II is a cross-section at line 2 2 of Fig. I. Fig.III is a top view or plan partly in section. Fig. IV shows a side Viewof the boiler with some modifications, and Fig. V is a cross-section ofthe same at line 3 3.

Similar letters represent similar parts in all thefigures.

A is the main boiler, having a flue, B, connected to it.

O and D are flues running parallel with the flue B, attached to the endof the boiler A,

. but having no direct connection with the same.

The flues B, O, and D are arranged in a triangle to each other, as shownin Figs. II and V. The flue D is connected with the flue O by an elbowor branch pipe, at, situated in the inside of the boiler A, and the flueG is connected to the flueB near their extreme outer ends by a pipe, m,placed outside of or in a -recess in the wall surrounding the boiler. By

this arrangement neither the connection-pipe it nor the connection-pipem will be exposed to the action of the fire and heat. Thefeed-water isintroduced through branch pipe it into the lowest flue, D, passesthrough the same and then through the connecting-pipe it into the flueO,

(No model.)

through said flue O and through the connecting-pipe m into the flueB,and from there into the main boiler A. By this arrangement a perfectcirculation of the Water through all the'flues is insured.

When the boiler is set in the brick-work, arranged with a returningdrop-flue, as shown in Figs. IV and V, flues E and F can he added andplaced into said return drop-flue, connected together at their innerends by a crosshranch, G. .The feed-water is in this case introducedthrough the branch pipe h into the flue E, passes through the same andthe crossbranch G into the flue F, and which latter being connected nearits extreme outer end, (either outside of the end brick wall or. in asuitable recess in-said wall,) through the branch pipe to, with the flueD, into said flue D, and then successively through the flues D, U, and Binto the main boiler A, as above described.

This construction of a steam-boiler, while producing a perfectcirculation of the water through all flues successively, exposes atthesame time the least number of joints to the direct action of the flameand heat of the fire.

Whatl claim as my invent-ion, and desire to secure by Letters Patent,is-

1. In combination with a boiler, A, with connecting-flue B, theindependent flues C and D. connected with each. other and with the flueB through connecting-pipes n and m, substantially as and for the purposedescribed.

2. In a steam-boiler consisting of the boiler A with flue B and theindependent flues O and D, the connecting-pipe n, situated in the insideof the boiler A, substantially as set forth.

JULIUS BERGMANN.

Witnesses HANS FRIEDRICH, RUDoLF HORN.

